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Schrödinger's Cat and annotation dialogues; was Re: Use Cases

From: Bob Morris <morris.bob@gmail.com>
Date: Sat, 1 Mar 2014 15:43:28 -0500
Message-ID: <CADUi7O6GjUo8fe7xi_jM7JYnTfj2V1UCHLYuYE7fEhR4JvvMGQ@mail.gmail.com>
To: "Cole, Timothy W" <t-cole3@illinois.edu>
Cc: public-openannotation <public-openannotation@w3.org>
The Schrödinger's Cat issue is very interesting in another use case
likely to rear its head, possibly more aggressively, for document
annotation in any context requiring dialogues between annotation
producer and consumer. For resource quality control annotations, such
dialogues may be common, e.g. between a resource editor and the
resource author. (editor: "The author mis-uses 'kitten'  for 'cat'
throughout and it should be changed" ; author: "I decline to change
it. Instead, I have added to revision 2 a paragraph explaining that on
the planet Vogon, not cats live to adulthood.")

The problem is that an annotation <A> can easily refer to an
annotation <B> that does not exist, but which is expected to refer to
<A>. If <B> eventually has the box opened and it proves to be a
response to <A>, the annotation dialogue graph (given by "<X> responds
to <Y>" ) may have cycles in it.  This causes issues with SPARQL
queries, although SPARQL 1.1 addresses them [1].

[1] http://www.w3.org/TR/sparql11-query/#propertypath-arbitrary-length


On Sat, Mar 1, 2014 at 1:04 PM, Tim Cole <t-cole3@illinois.edu> wrote:
> >[...]
> A relevant question (I think) is whether (in the context of RDF and OA) we
> can unambiguously give identity as a single Resource (e.g., as an extension
> of the oa:SpecificResource class)  to what is essentially a not yet
> enumerated ad hoc aggregation of oa:SpecificResources?  Perhaps there's a
> bit of a Schrödinger's Cat issue lurking here.

Robert A. Morris

Emeritus Professor  of Computer Science
100 Morrissey Blvd
Boston, MA 02125-3390

Filtered Push Project
Harvard University Herbaria
Harvard University

email: morris.bob@gmail.com
web: http://efg.cs.umb.edu/
web: http://wiki.filteredpush.org
The content of this communication is made entirely on my
own behalf and in no way should be deemed to express
official positions of The University of Massachusetts at Boston or
Harvard University.
Received on Saturday, 1 March 2014 20:43:56 UTC

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